iTextSharp.text.pdf.PRTokeniser.CheckPdfHeader C# (CSharp) Метод

        public char CheckPdfHeader() {
            file.StartOffset = 0;
            String str = ReadString(1024);
            int idx = str.IndexOf("%PDF-");
            if (idx < 0)
                throw new IOException("PDF header signature not found.");
            file.StartOffset = idx;
            return str[idx + 7];
        }